An oscilloscope is an invaluable tool for anyone working in electronics. It allows studying electrical signals that are changing over time. Perfect for troubleshooting, monitoring, or simply observing one's electronic creations in more detail.

Unfortunately, even with significant reductions in cost in recent years, a usable oscilloscope remains out of reach for many people who could benefit from it - especially young students just starting out, and many hobbyists on a limited budget. A good low-end standalone scope easily comes in at over US$1000, and even PC-based scopes (which connect to a computer for display and control) usually cost US$300 and above.

On the other hand, most "hobby" solutions (sound-card based or purely microcontroller based) lack sufficient performance and usually are not much more than toys without much practical use. Of course it is often possible to pick up a decent used analog scope on Ebay for a good price, but most such scopes (cathode ray type) are rather bulky and bothersome, especially for someone without the luxury of a spacious electronics lab, and they often are difficult to use without a good dose of prior experience.

For that reason, I set out to develop a simple yet full-featured digital sampling oscilloscope that I hope will enable you to get a successful start in this domain. The main goals in this development were:

Create something that is really usable in practice - i.e. it must have sufficient sample rate to at least cover the audio range (DC up to well over 20 kHz), and a wide input range (from Millivolts up to several Volts).

Keep down cost as much as possible and design it in a way that all the components are easy to procure and assemble, so any moderately skilled hobbyist can build his/her own (see circuit description and "Build It" pages).

Make it easy to use so even a user without much experience with oscilloscope gets a quick start, and make it compact so it doesn't use much desk space.

Last but not least, make it an open design so anyone can improve upon it. Note that the design may be used without any restrictions for personal, non-commercial use only. Any other use is strictly prohibited without explicit, written permission by the author.

For questions, suggestions, feedback etc. please do not hesitate to contact us.

What is this site about?

Disclaimer: The author of these pages does not assume any responsibility whatsoever regarding the design, construction or use of the described circuit. The author cannot be held responsible for any damage to persons or property connected with the described design. This includes (but is not limited to) damage to your computer, fitness for a specific task, and specified performance. If you decide to build the oscilloscope and use it, you do so at your own risk. Observe safety guidelines when soldering. Never apply any voltage exceeding 20V to the oscilloscope inputs.

Please note that I have a new design, the DPScope, which is superior to the LCS-1M in every respect- higher performance, smaller, faster, easier and lower cost to build (who says you can't get all of that at the same time?). Unless you really want to build a Picaxe based instrument I highly recommend going for the new design (the corresponding webpage is here).

Of course I will still fully support the LCS-1M in the future, but I do not plan to order another batch of printed circuit boards, so when my current stock runs out, that will be it.